Properties of Minerals 4.1



Vocabulary:


mineral: a naturally occurring, inorganic solid that a has a crystal structure and a definite chemical composition.
inorganic: the mineral cannot arise from materials that were once part of a living thing.
crystal: a solid, formed by the repeating pattern of a mineral's particles.
element: a substance composed of a single kind of atom.
compound: two or more elements combined so that the elements no longer have distinct properties.
Mohs Hardness Scale: the scale that ranks ten minerals from softest to hardest.
streak: a color of a mineral's powder.
luster: the term used to describe how a mineral reflects light from it's surface.
cleavage: a mineral that splits evenly along flat surfaces.
fracture: describes how a mineral looks when it breaks in irregular ways.
fluorescence: minerals that glow under ultra-violet light.

Outline:


Properties of minerals

      • minerals are used in items such as tin-cans or computer chips

What is a mineral?

      • mineral
    • Naturally Occuring
      • cement, brick, steel, glass- made of Earth's crust
    • Inorganic
      • inorganic
    • Solid
      • mineral is always a solid
    • Crystal Structure
      • crystal
    • Definite Chemical Composition
      • element
      • compound

Identifying Minerals

      • each mineral has own specific properties
    • Hardness
      • Mohs Hardness Scale
    • Color
      • color- easily observed physical property
    • Streak
      • streak
    • Luster
      • luster
    • Density
      • each mineral has a characteristic density
    • Crystal Systems
      • crystals grow atom by atom
    • Cleavage and Fracture
      • cleavage
      • fracture
    • Social Properties
      • fluorescence


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